McDonnell & Miller 1-1/4″ Flow Switch
SKU: FS7-4

Description

Universal design serves the widest variety of large pipe applications, including heating and hydronic systems, air conditioning, refrigeration, and process work:

• 1-1/4″ NPT
• Brass with sealed tube construction
• Single pole, double throw snap switch
• The magnetic switching mechanism eliminates the need for
  bellows
• Sensitivity adjusting screw makes flow adjustment easy
• Paddles can be trimmed to suit application needs

Optional Features

• Extended paddle arm – Model FS7-4L
• Two SPDT switches to make or break two separate circuits
• Stainless steel body and paddles
• BSPT threads
• Fire sprinkler service – Model FS7-4F- for 11/4″ thru 21/2″
• NPT piping only (see chart p.93)
• Minimum temperature (fluid or ambient) 32 Deg.F (0 Deg. C)
• Maximum temperature 300 Deg. F (149 Deg. C)
• Maximum operating pressure
  300 psi (21 kg/cm2)
• 1000 psi (70 kg/cm2) – Stainless Steel models
• Pneumatic control – FS7-4A – option available w/ 1/8″ NPT airline connection; max. 50 psi air supply (non-electrical)